Download or read book Rock Fracture and Rockbursts written by W. David Ortlepp and published by . This book was released on 1997 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolution Monitoring and Predicting Models of Rockburst written by Chunlai Wang and published by Springer. This book was released on 2017-12-13 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book focuses on investigating predicting precursor information and key points of rockburst in mining engineering through laboratory experiment, theoretical analysis, numerical simulation and case studies. Understanding the evolution patterns for the microstructure instability of rock is a prerequisite for rockburst prediction. The book provides a guide for readers seeking to understand the evolution patterns for the microstrucure of rock failure, the predicting key point of rock failure and the rockburst predicting model. It will be an essential reference to understand mechanism of rockburst and sheds new light on dynamic disasters prediction. Chapters are carefully developed to cover (1) The evolution patterns for the microstructure instability of rock; (2) Rockburst hazard monitoring and predicting criterion and predicting models. The book addresses the issue with a holistic and systematic approach that investigates the occurrence mechanism of rockburst based on the evolution patterns for the microstructure of rock failure and establishes the predicting model of rockburst. This book will be of interest to researchers of mining engineering, rock mechanics engineering and safety engineering.
Download or read book Rockburst written by Xia-Ting Feng and published by Butterworth-Heinemann. This book was released on 2017-10-19 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rockburst: Mechanisms, Monitoring, Warning and Mitigation invites the most relevant researchers and practitioners worldwide to discuss the rock mechanics phenomenon related to increased stress and energy levels in intact rock introduced by drilling, explosion, blasting and other activities. When critical energy levels are reached, rockbursts can occur causing human and material losses in mining and tunneling environments. This book is the most comprehensive information source in English to cover rockbursts. Comprised of four main parts, the book covers in detail the theoretical concepts related to rockbursts, and introduces the current computational modeling techniques and laboratory tests available. The second part is devoted to case studies in mining (coal and metal) and tunneling environments worldwide. The third part covers the most recent advances in measurement and monitoring. Special focus is given to the interpretation of signals and reliability of systems. The following part addresses warning and risk mitigation through the proposition of a single risk assessment index and a comprehensive warning index to portray the stress status of the rock and a successful case study. The final part of the book discusses mitigation including best practices for distressing and efficiently supporting rock. Designed to provide the most comprehensive coverage, the book will provide practicing mining and tunneling engineers the theoretical background needed to better cope with the phenomenon, practical advice from case studies and practical mitigation actions and techniques. Academics in rock mechanics will appreciate this complete reference to rockburst, which features how to analyze stress signals and use computational modeling more efficiently. Offers understanding of the fundamental theoretical concepts of rockbursts Explores how to analyze signals from current monitoring systems Shows how to apply mitigating techniques in current work Identifies characteristics that should be measured in order to detect rockburst risk
Download or read book Rockbursts written by Wilson Blake and published by SME. This book was released on 2003 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a series of case studies, this essential reference documents the experiences of 15 of the most rockburst-prone mines in the U.S. and Canada over the last century. The book provides an historical analysis of rockburst activity along with state-of-the-art strategies for anticipating and preventing this dangerous and disruptive phenomenon.
Download or read book Rockburst Evolutionary Process and Energy Dissipation Characteristics written by Dazhao Song and published by Springer. This book was released on 2019-04-27 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book investigates the evolution process of rockburst based on the energy dissipation theory and proposes appropriate active prevention and control technologies. It discusses the electromagnetic radiation (EMR) generated by coal rock fractures as a measurement of the amount of dissipated energy, and the use of EMR to experimentally observe the time domain characteristics of energy dissipation during coal rock failure processes. It then proposes the concept of the rockburst activity domain system (RADS), establishes a dynamic pressure model of rockburst, and describes the energy criterion for rockburst instability. Lastly, it presents two waterjet cutting-based cases of pressure relief and rockburst prevention. The book serves as a reference resource for mine safety workers, engineering technicians, scientists, graduate students and undergraduates engaged in research on dynamic hazards such as rockburst..
Download or read book Numerical Exploration of Shear fracture related Rock Bursts Using a Strain softening Constitutive Law written by Jeff K. Whyatt and published by . This book was released on 1991 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture Mechanics of Rock written by Barry Kean Atkinson and published by Elsevier. This book was released on 2015-05-11 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of crack problems through fracture mechanics has been applied to the study of materials such as glass, metals and ceramics because relatively simple fracture criteria describe the failure of these materials. The increased attention paid to experimental rock fracture mechanics has led to major contributions to the solving of geophysical problems. The text presents a concise treatment of the physics and mathematics of a representative selection of problems from areas such as earthquake mechanics and prediction, hydraulic fracturing, hot dry rock geothermal energy, fault mechanics, and dynamic fragmentation.
Download or read book Rock Fractures in Geological Processes written by Agust Gudmundsson and published by Cambridge University Press. This book was released on 2011-04-28 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock fractures control many of Earth's dynamic processes, including plate-boundary development, tectonic earthquakes, volcanic eruptions, and fluid transport in the crust. An understanding of rock fractures is also essential for effective exploitation of natural resources such as ground water, geothermal water, and petroleum. This book combines results from fracture mechanics, materials science, rock mechanics, structural geology, hydrogeology, and fluid mechanics to explore and explain fracture processes and fluid transport in the crust. Basic concepts are developed from first principles and illustrated with worked examples linking models of geological processes to real field observations and measurements. Many additional examples and exercises are provided online, allowing readers to practise formulating and quantitative testing of models. Rock Fractures in Geological Processes is designed for courses at the advanced undergraduate and graduate level but also forms a vital resource for researchers and industry professionals concerned with fractures and fluid transport in the Earth's crust.
Download or read book Laboratory Investigation Into Fracturing of Uniaxially Loaded Hard Rock with Expansive Cement written by Flavie Arseneau and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "A rockburst can be defined as a sudden and violent ground failure often associated with a seismic event. Rockbursts are a danger to underground mine workers and jeopardize smooth mining operations. To avoid rockbursts, multiple techniques have been developed such as ground preconditioning (relieving stress of the rock and promoting fracturing of the rock mass via drilling and blasting), ground support (cables, high endurance rock bolts, meshes) or alternative mining sequences. The current research focuses on ground pre-conditioning.Ground preconditioning, which is a type of ''destress blasting'', is only optimally effective when applied correctly on time and at the right place, with the right quantity of explosives. Further research is needed in this field as the process of blasting with explosives energy to create fractures imposes rigorous safety measures on site. This thesis is the extension of previous work of the Mine Design Laboratory (Musunuri & Mitri, 2009) (Dessouki & Mitri, 2011) on explosive-free rock breakage. This thesis further explores the efficiency of hole notching to enhance the rock fracturing process. This new concept aims to find advantages into inducing less seismicity into the rockmass and generating sufficient fractures to prevent rockbursts.The primary goal of this study is to set up an experimental program in the Rockbolting Lab of the Mine Design Laboratory to conduct customized testing related to ground pre-conditioning, discrete fracturing, expansive cement and hole notching. The second goal of this study is to evaluate the competency of expansive cement under axial loading. The third goal of this study is to evaluate the effectiveness of hole notching to enhance the rock fracturing process. A constant uniaxial pressure (CUP) experiment was adopted to simulate in-situ stress conditions. Based on the work done in this study, it is shown that expensive cement and hole notching could be effective to fracture granite rock samples under axial load. Suggestions to improve the experiment procedure, as well as recommendations for further testing are made." --
Download or read book Rockbursts and Seismicity in Mines 93 written by R. Paul Young and published by CRC Press. This book was released on 1993-01-01 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings include the latest developments in research and practice in the area of mining-induced seismicity. Three themes are explored: strong ground motion and rockburst hazard; mechanics of seismic events and stochastic methods; and monitoring of seismicity and geomechanical modelling.
Download or read book Rock Fractures and Fluid Flow written by Committee on Fracture Characterization and Fluid Flow and published by National Academies Press. This book was released on 1996-09-10 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific understanding of fluid flow in rock fractures--a process underlying contemporary earth science problems from the search for petroleum to the controversy over nuclear waste storage--has grown significantly in the past 20 years. This volume presents a comprehensive report on the state of the field, with an interdisciplinary viewpoint, case studies of fracture sites, illustrations, conclusions, and research recommendations. The book addresses these questions: How can fractures that are significant hydraulic conductors be identified, located, and characterized? How do flow and transport occur in fracture systems? How can changes in fracture systems be predicted and controlled? Among other topics, the committee provides a geomechanical understanding of fracture formation, reviews methods for detecting subsurface fractures, and looks at the use of hydraulic and tracer tests to investigate fluid flow. The volume examines the state of conceptual and mathematical modeling, and it provides a useful framework for understanding the complexity of fracture changes that occur during fluid pumping and other engineering practices. With a practical and multidisciplinary outlook, this volume will be welcomed by geologists, petroleum geologists, geoengineers, geophysicists, hydrologists, researchers, educators and students in these fields, and public officials involved in geological projects.
Download or read book Rock Support in Mining and Underground Construction written by P.K. Kaiser and published by CRC Press. This book was released on 1992-01-01 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: An up-to-date record of the most recent developments and thinking in the methods, problems and challenges in the field of rock support, including cable bolting, shotcrete in mining, support in rockburst-prone ground, and support design, analysis and applications.
Download or read book A Survey of Mining Associated Rockbursts written by Janet C. Johnston and published by . This book was released on 1988 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parameters related to rockbursts, specifically types of ore, mining operation, magnitude-frequency statistics, maximum magnitudes, depths, and presence of precursory phenomena, are compiled for various tectonic/geologic regions. Data from Canada, the United States, Great Britain, Sweden, West Germany, Poland, Czechoslovakia, South Africa, the USSR, China, Japan, and Australia are tabulated and sorted according to type of geologic conditions. Similarities and differences in source characteristics between rockbursts and natural crustal earthquakes are examined and classified. Type I rockbursts are directly related to an advancing mine face; Type II events involve induced movement along preexisting fault planes. Reliability of prediction of the maximum size of rockbursts based upon mine area, excavation rate, geology, and extent of fracturing of adjacent rock is assessed with special focus on consistency between different areas of the world. The number of Type I rockbursts is found to be a direct function of excavation rate; their locations are consistently determined by location of the mine face and by local geological structure. When Type I events results in new fracture planes, high stress drops result. It is possible that an inactive fault can be activated by the presence of a mine, resulting in Type II rockbursts. Search for reliable precursory phenomena has been unsuccessful. The upper limit for Type I events seems to be controlled by the strength of the rock, whereas the upper limit for Type II events is a completely open question at this time.
Download or read book Rock Fracture and Blasting written by Zong-Xian Zhang and published by Butterworth-Heinemann. This book was released on 2016-04-26 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock Fracture and Blasting: Theory and Applications provides the latest on stress waves, shock waves, and rock fracture, all necessary components that must be critically analyzed to maximize results in rock blasting. The positioning of charges and their capacity and sequencing are covered in this book, and must be carefully modeled to minimize impact in the surrounding environment. Through an explanation of these topics, author Professor Zhang’s experience in the field, and his theoretical knowledge, users will find a thorough guide that is not only up-to-date, but complete with a unique perspective on the field. Includes a rigorous exposition of Stress Waves and Shock Waves, as well as Rock Fracture and Fragmentation Provides both Empirical and Hybrid Stress Blasting Modeling tools and techniques for designing effective blast plans Offers advanced knowledge that enables users to choose better blast techniques Includes exercises for learning and training in each chapter
Download or read book Numerical Exploration of Shear fracture related Rock Bursts Using a Strain softening Constitutive Law written by Jeff K. Whyatt and published by . This book was released on 1991 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Fracture Mechanics written by Barry N. Whittaker and published by Elsevier Publishing Company. This book was released on 1992 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fractals in Rock Mechanics written by Heping Xie and published by CRC Press. This book was released on 2020-12-17 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Important developments in the progress of the theory of rock mechanics during recent years are based on fractals and damage mechanics. The concept of fractals has proved to be a useful way of describing the statistics of naturally occurring geometrics. Natural objects, from mountains and coastlines to clouds and forests, are found to have boundaries best described as fractals. Fluid flow through jointed rock masses and clusterings of earthquakes are found to follow fractal patterns in time and space. Fracturing in rocks at all scales, from the microscale (microcracks) to the continental scale (megafaults), can lead to fractal structures. The process of diagenesis and pore geometry of sedimentary rock can be quantitatively described by fractals, etc. The book is mainly concerned with these developments, as related to fractal descriptions of fragmentations, damage and fracture of rocks, rock burst, joint roughness, rock porosity and permeability, rock grain growth, rock and soil particles, shear slips, fluid flow through jointed rocks, faults, earthquake clustering, and so on. The prime concerns of the book are to give a simple account of the basic concepts, methods of fractal geometry, and their applications to rock mechanics, geology, and seismology, and also to discuss damage mechanics of rocks and its application to mining engineering. The book can be used as a textbook for graduate students, by university teachers to prepare courses and seminars, and by active scientists who want to become familiar with a fascinating new field.
